Is Your 1999 Escalade Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with frustrating engine problems in your first-generation Cadillac Escalade, a failing Powertrain Control Module (PCM) is often the culprit. Over my 20+ years turning wrenches, I’ve seen these exact symptoms hundreds of time on these GM trucks. A faulty PCM can cause a cascade of issues, from hard starting and erratic shifting to terrible fuel mileage and even a complete no-start condition. Don’t let a bad computer keep your classic luxury SUV off the road. This is the reliable, straightforward solution you’ve been looking for.
The Smart Solution: A VIN-Programmed PCM Ready for Installation
This isn’t just a used part pulled from a yard. This is a fully tested, genuine GM PCM that we program specifically for your vehicle before it ships. You provide us with your Vehicle Identification Number (VIN) at checkout, and our technicians flash the module with the latest, most stable software updates directly from GM. This ensures your engine and transmission operate exactly as the manufacturer intended, often fixing drivability quirks you might have thought were normal.
Expert Pro Tip: Check Your Connectors Before Installation
A customer’s ’99 Yukon (which uses this same PCM) came in last week with intermittent stalling that another shop couldn’t diagnose. They had already replaced the PCM once. When I inspected the harness, I found green corrosion deep inside one of the main PCM connectors. Before you install your replacement module, take a moment to closely inspect the vehicle’s harness connectors. Use a quality electrical contact cleaner and a small, soft brush to gently clean the pins and sockets. A clean, solid connection is critical for the PCM to function correctly and can prevent a host of phantom issues.
Why Choose Our 1999 Escalade PCM?
Getting your truck back to peak performance is our top priority. This module is the central hub for your engine’s operations, and our service makes replacing it simple and effective.
- โ VIN-Specific Programming: We load your vehicle’s exact software and the newest GM updates for optimal performance and compatibility.
- โ No Dealer Required: This module arrives ready to install. You can skip the expensive trip to the dealership for programming.
- โ Solves Common Issues: A direct fix for problems like Check Engine Light (CEL), failed emissions tests, rough idle, poor acceleration, and communication errors.
- โ Cost-Effective Repair: Get a reliable, tested OEM part that has been professionally prepared for a fraction of the cost of a new module and dealer labor.
- โ Guaranteed Compatibility: This unit is a direct replacement for multiple part numbers, including 16266645 and 09355699.
Simple, Plug-and-Play Installation Guide
You don’t need to be a master mechanic to install this part. With basic hand tools, you can have your Escalade running right in under an hour.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On your 1999 Escalade, the PCM is located in the engine compartment, typically on the driver’s side near the fender or firewall.
- Disconnect the Harness: Carefully unplug the electrical connectors from the old PCM. There are usually release tabs that need to be depressed or levers that need to be rotated.
- Remove the Old Module: Unbolt the PCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal. Your vehicle is now ready to start.
Part Number Compatibility
This module is a direct replacement for the following part numbers: 09355699, 16266645, 16250279, 16258815, 09366810, and 9366810. Please verify that one of these numbers matches the one on your current module to ensure a perfect fit.